Two Small Quakes Recorded Near Calumet, Oklahoma in One Morning; Nearly 40 Statewide in a Week
U.S. Geological Survey records show two earthquakes struck near Calumet between 4:30 and 5:30 a.m. on November 5, both below magnitude 3, at a depth of about six kilometers (roughly four miles), with no damage reported. Shaking was felt in several parts of the state the day before as well: at about 1 a.m. on November 4, a magnitude 3.57 quake struck near Enid, and Tulsa-area residents twice felt the ground move between 2 and 4 p.m. on November 4, though the USGS determined those were two quarry blasts near Owasso, measuring about magnitude 1.5 at the surface. USGS data show that from October 29 to the morning of November 5, nearly 40 reportable seismic events were recorded statewide, some of them quarry blasts. Earthquakes are frequent in Oklahoma, most of them related to the underground disposal of wastewater from oil and gas production, rather than hydraulic fracturing itself. The USGS notes that since 1990, hydraulic fracturing has induced only a few earthquakes, and the largest known fracking-induced quake in the state was a magnitude 3.6 event in 2019.
(Source: U.S. Geological Survey)
Source: U.S. Geological Survey
Published by GSM · USA (original Chinese edition)
Photo: 俄克拉何马城俄克拉荷马州议会大厦（图：Wikimedia Commons，CC BY-SA 2.0） / The Oklahoma State Capitol in Oklahoma City (Wikimedia Commons, CC BY-SA 2.0)
